After retrieving the upgrade module for Light Switch 01, the switch can bathe the Courier in "Smart Light", effectively increasing their Intelligence by 2, and their Science and Repairskills by 5 points each. This effect will linger for up to twelve hours, or unless the player activates the "Mood Lights" controlled by Light Switch 02.

Without the upgrade module, it is only possible to use the light switch to toggle the normal lights while the Personality Matrices are toggled off at the Sink CIU.